Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Biodegradable bursting release system










Image Number 4 for United States Patent #5429822.

A biodegradable polymeric multiphasic release system of one or more biodegradable bursting units capable of delivering biologically active substances in a burst or pulse at predetermined times and a method for constructing those units is disclosed. The individual bursting units of the system may take the form of a biodegradable, membrane coated capsule surrounding a core material which may include an active agent. The membrane ruptures after a predetermined time upon exposure to water or bodily, or other aqueous environmental fluids. The bursting units may be used in any situation in which a controlled pulsed release of an active substance is desired. The predetermined time release of each bursting unit is controlled by the composition of the core material, the initial radius and wall thickness of the membrane and the porosity of the membrane. The core material may also contain a chemical composition which generates gas as fluid is drawn into the bursting unit thus adding an additional design variable for predetermining bursts.








 
 
  Recently Added Patents
Optical scanner and image-forming device
Noise suppression in speech signals
Systems and methods for providing live voicemail to a mobile handset
Tag-based apparatus and methods for neural networks
Porous objects having immobilized encapsulated biomolecules
Pet grooming brush and vacuum attachment
Spatula
  Randomly Featured Patents
Method of manufacturing bonded assembly
Immunocytokine sequences and uses thereof
Method and system for constructing database queries using a field selection grid
Network connection hand-off using state transformations
Solid state relay
Electric household appliance having a child safety feature
Method for manufacturing and storing stable bicarbonate solutions
Methods for coating a magnesium component
Self-texturing absorbent structures and absorbent articles made therefrom
Liquid crystal display and manufacturing method of same